I will answer that one anon from kittypet's ask box, rapid-fire.
Breeze/Lion: Probably the strongest conceptually of the group. Maybe they meet instead of Heatherpaw in the tunnels, or they meet through both knowing her, or they train in the arc3 dark forest together, who knows. Mutual teen angst brings them together, the news about their shared parentage causes oh so much drama. Berrynose gets jealous.
Breeze/Holly: Kind of similar to Breeze/Lion except it's harder to see Hollyleaf going for a cross-clan relationship. Maybe after the fire scene and the big reveal they fall into a "parents suck so much, you know what would really upset them? If we kissed." They would be terrible for each other, probably.
Breeze/Jay: I have no idea how these two would get together, but it's kind of a cute concept (two grumpy brothers). The attack at the moonpool mixed with that "whoa your hurt sound is vaguely sexual" post.
Breeze/Crow: There's plenty to do with this, but if we want to shoot for "plausible," you could figure out something post-Crowfeather's Trial. Like "we don't work as father and son, but perhaps would could work... as Toms." Bonus points if they pull Harestar in.
Breeze/Night: What can be said about this that hasn't probably already been said? Breezepelt is probably the ultimate "momma's boy." So many ways to run with that, especially in this specific scenario of "Crowfeather abandoned us both, we only have each other."